Effect of body size on heat tolerance of a freshwater catfish (<i>Trichomycterus areolatus</i>).

ABSTRACT: Rivers are under intense anthropogenic pressure, leading to increases in water temperature and changes in physicochemical properties, which threaten aquatic biota. Understanding how these environmental changes affect heat tolerance in freshwater organisms is critical for assessing the status of wild populations and predicting their vulnerability under global warming scenarios. Here, we studied how body mass and heat tolerance, measured by thermal death time (TDTs) curves under normoxic and hypoxic conditions, vary among populations of the Chilean pencil catfish Trichomycterus areolatus inhabiting a Mediterranean river in central Chile. We detected significant differences in fork length, body mass and Fulton's condition factor among populations, with fish from reference sites being s

SUBMITTER: Aviles-Hernandez D 

PROVIDER: S-EPMC12649744 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature